Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ian Michael Williams

Q: What is the NPI number for Ian Williams?

The National Provider Identifier (NPI) for Ian Williams is 1083519045, a Type 1 (individual) record in the CMS NPPES registry.

Pediatric Registered Nurse in Randolph, MA · enumerated 2026.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1083519045

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Registry record

Entity type Individual (Type 1)

Name Ian Michael Williams

Sex Male

Practice address Randolph, MA, 02368

Phone (857) 222-1744

Enumeration date Oct 10, 2026

Last updated in NPPES Oct 10, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163WP0200X Pediatric Registered Nurse Nursing Service Providers · License RN10010134 (MA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Ian Williams practice?

The practice location on file with NPPES is in Randolph, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Ian Williams?

The National Provider Identifier (NPI) for Ian Williams is 1083519045, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-10-10.